Add ATTEST_KEY support am: 44c388800b am: 75d329fc25 am: e31dda6a6f

Original change: https://android-review.googlesource.com/c/platform/system/keymaster/+/1584565

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I368f16852717572e69dd08e0714bbea09195702c